Further experiments regarding the leakage current of mesa silicon PN junctions are presented. For gold diffused junctions, generation-recombination centers lead to a dominance of the bulk leakage current component both at reverse and low forward bias voltage but a minor surface component still controls the junction blocking capability. For electron irradiated junctions, the surface component of reverse current may be the primary component up to a junction temperature of 100-150/spl deg/C. When the density of bulk generation-recombination centers is low, their influence on the reverse I-V characteristic is negligible from the room temperature up to above 200/spl deg/C.
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